Counterintuitive dispersion violating Kramers-Kronig relations in gain slabs. Academic Article uri icon


  • We demonstrate the counterintuitive dispersion effect that the peaks (dips) in the gain spectrum correspond to abnormal (normal) dispersion, contrary to the usual Kramers-Kronig point of view. This effect may also lead to two unique features: a broadband abnormal dispersion region and an observable Hartman effect. These results are explained in terms of interference and boundary effects. Finally, two experiments are proposed for the potential experimental verification.

published proceedings

  • Phys Rev Lett

altmetric score

  • 0.25

author list (cited authors)

  • Wang, L., Wang, L., Al-Amri, M., Zhu, S., & Zubairy, M. S.

citation count

  • 13

complete list of authors

  • Wang, Li-Gang||Wang, Lin||Al-Amri, M||Zhu, Shi-Yao||Zubairy, M Suhail

publication date

  • June 2014